Spatially dependent diffusion

In the termspatially dependent diffusion process, it is assumed that the spread is spatially continuous from one or several sources. termContagious expansion diffusion: where the spreading phenomenon has a source and diffuses outwards into new contiguous areas, like wildfire or diffusion of innovation or an infectious disease.

Principle of contagious expansion diffusion at successive moments of time                             Principle of contagious expansion diffusion at successive moments of time

termRelocation diffusion: where the spread occurs when the spreading phenomena moves into new areas like migration. It could be interpreted as a movement or a travel in space. This specific spatial process will be considered in more details in the next section.

                     Principle of contagious relocation diffusion at successive moments of time. The feature is moving throughout space                     Principle of contagious relocation diffusion at successive moments of time. The feature is moving throughout space